645150346 has 4 divisors (see below), whose sum is σ = 967725522. Its totient is φ = 322575172.

The previous prime is 645150307. The next prime is 645150347. The reversal of 645150346 is 643051546.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 403005625 + 242144721 = 20075^2 + 15561^2 .

It is not an unprimeable number, because it can be changed into a prime (645150347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161287585 + ... + 161287588.

Almost surely, 2^645150346 is an apocalyptic number.

645150346 is a deficient number, since it is larger than the sum of its proper divisors (322575176).

645150346 is a wasteful number, since it uses less digits than its factorization.

645150346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322575175.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 645150346 is about 25399.8099599190. The cubic root of 645150346 is about 864.0793867456.

The spelling of 645150346 in words is "six hundred forty-five million, one hundred fifty thousand, three hundred forty-six".